Dependency-free drop-in alternative for stringr::str_count()
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str_count(string, pattern = "")
An integer vector.
Input vector. Either a character vector, or something coercible to one.
Pattern to look for.
The default interpretation is a regular expression,
as described in base::regex.
Control options with regex()
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Match a fixed string (i.e. by comparing only bytes), using fixed()
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This is fast, but approximate.